Re: Question about alias name

[neu lzf via Tech-talk <tech-talk at aps.anl.gov>]

Thanks for your reply.

I am using the version of EPICS Base 3.15.9.

---

From: Michael Davidsaver <mdavidsaver at gmail.com>
Sent: 16 September 2022 18:35
To: lzfneu at live.com <lzfneu at live.com>
Cc: tech-talk at aps.anl.gov <Tech-talk at aps.anl.gov>
Subject: Re: Question about alias name

 

On 9/15/22 20:00, lzfneu--- via Tech-talk wrote:
> Dear all,
>
> I try to use alias name for my existed pv names, part of the record are as follows:
>
> record (calc, "test")
> {
>      alias("test:alias_name")
>      field(INPA,"test_pv.VAL")
>      field(ADEL, "-1")
>      field(CALC, "A*10")
>      field(EGU, "m")
>      field(FLNK, "test2")
> }
>
> record(calc, "test2")
> {......
>       ......
> }
>
> When I run the IOC, I received the following errors:
> ErrorCan't create alias "test:alias_name" for "test" Error at or before ")" in file "db/ai.template" line XX.
> And XX is the alias filed line number.
>
> Although showed the error messages, the alias PV name "test:alias_name" can normally receive the same data as PV name "test". I have no idea how to correct the error messages.
>
> Any help will be appreciated and thanks in advance.

What version of EPICS Base are you using?

I'm not able to replicate with 7.0.7

> $ cat alias.db
> record (calc, "test")
> {
>         alias("test:alias_name")
>         field(INPA,"test_pv.VAL")
>         field(ADEL, "-1")
>         field(CALC, "A*10")
>         field(EGU, "m")
>         field(FLNK, "test2")
> }> $ softIoc -d alias.db
> Starting iocInit
> ############################################################################
> ## EPICS R7.0.6.2-DEV
> ## Rev. R7.0.6.1-260-ga0a937d0b6ce07c20358
> ## Rev. Date Git: 2022-09-03 11:36:57 -0700
> ############################################################################
> Forward-link uses Channel Access without pointing to PROC field
>     test.FLNK => test2
> iocRun: All initialization complete
> epics>